Layers of the earth
The least dense layer of the earth.
Crust
At a divergent boundary.
Plates move apart
How do continents move ?
Convection currents
At a transform boundary what occurs?
Earthquakes occur
No one believed him because .
He couldn't explained how they moved
The thickest layer of the earth.
Mantle
At a convergent boundary.
Plates push together
Why do they move?
Convection currents
At a Divergent boundary what occurs?
multiple answers
rift valleys and volcanos and mid ocean ridges
What was Alfred Wegner's theory?
Continental drift
The hottest layer of the earth.
Inner core
At a transform boundary.
Plates slide past each other
When all the continents were combined what was it called
Pangea
At a Convergent boundary what occurs?
Mountain ranges
When did they rethink Alfred Wegner's theory?
1960s
The most dense layer of the earth.
Inner core
Seafloor spreading is an example of what boundary.
Divergent
How long ago was Pangaea a thing?
250 million years ago
When a higher dense plate meets a less dense plate what occurs?
Subduction zone
Harry Hess discovered that oceanic crust is ______ near a mid ocean ridge.
Younger
Earth's layers from the center to the surface are?
Inner Core,Outer Core,Mantle,Asthenosphere,Lithosphere,Oceanic Crust,Continental Crust
New crust is formed At a?
Divergent boundary
Another way they move is
Divergent boundaries
Convergent boundaries
Transform boundaries
An _____ happens when there is a sudden release of stress in the lithosphere.
Earthquake
When was he born and when did he die?
hahaha this one is very hard :)
1880-1930